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<h2>DESCRIPTION</h2>
This module is based on <b>g.gui.gcp</b>, the GCP manager of GRASS GIS.
It is part of i.ortho.photo suite.

<p>
The aim of this module is to give absolute location values to the fiducial 
points present (in number of 4 or 8) in a <i>scanned</i> aerial photo. 

<p>
This is necessary as (manual) scanning introduces distortions, rotations and also 
may not be limited to scan the boundary of the photo itself. It is thus necessary
to give to each fiducial the exact coordinates in mm as given by the aerial 
photographic instrument design, which is unique per camera.

<p>
This module requires you to have made a group with your aerial photo <b>(i.group)</b>, a camera
description file <b>(i.ortho.target)</b> and use them to launch the module. Additional requirements
are the order of rectification (1 if no of Fiducials is 4, 2 if no of Fiducials is 8) and 
an extension file (if not given, defaults to \$filename_ip2i_out)

<p>
An example for Location <b>imagery60</b>:

<div class="code"><pre>
g.gui.photo2image group=aerial@PERMANENT raster=gs13.1@PERMANENT camera=gscamera order=2 extension=try --o
</pre></div>

<h3>Screenshot of g.gui.photo2image</h3>

<div align="center" style="margin: 10px">
<a href="wxGUI_iphoto2image_frame.jpg">
<img src="wxGUI_iphoto2image_frame.jpg" width="600" height="375" alt="Screenshot of g.gui.photo2image" border=0>
</a><br>
<i>Figure: Screenshot of g.gui.photo2image</i>
</div>

<h2>For a detailed operation manual please read</h2>

<em>
<a href="wxGUI.html">wxGUI</a><br>
<a href="wxGUI.components.html">wxGUI components</a>
</em>

<p>
See also <a href="https://grasswiki.osgeo.org/wiki/WxGUI/Video_tutorials#Georectifier">video
tutorials</a> on GRASS Wiki.

<h2>SEE ALSO</h2>

<em>
<a href="i.ortho.photo.html">i.ortho.photo</a>,
<a href="i.group.html">i.group</a>,
<a href="i.ortho.camera.html">i.ortho.camera</a>,
<a href="i.ortho.target.html">i.ortho.target</a>,
<a href="i.rectify.html">i.rectify</a>,
<a href="m.transform.html">m.transform</a>,
<a href="v.rectify.html">v.rectify</a>
</em>

<h2>AUTHORS</h2>

Markus Metz<br><br>
<em>Based on the Georectifier (GRASS 6.4.0)</em> by Michael Barton<br>
Martin Landa, Czech Technical University in Prague, Czech Republic

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